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Choking on our own carbon dioxide

Before you pick on someone else’s carbon dioxide levels… …it pays to check your own. That’s the lesson I learnt last week as we investigated Sydney trains (see our Sydney Trains post). Before we headed out on the trains we kick started a hand held carbon dioxide meter in the office. It was mid-afternoon and […]

CO2 Levels Rising

Last year the world had yet another confirmation that CO2 levels are rising. “On May 2, after nightfall shut down photosynthesis for the day in Hawaii, carbon dioxide levels in the atmosphere touched 400 parts-per-million there for the first time in at least 800,000 years. Near the summit of volcanic Mauna Loa—where a member of […]